clear code

iOSClient/Main/CCDetail.m

@@ -223,7 +223,8 @@
                 
                 self.edgesForExtendedLayout = UIRectEdgeBottom;
                 [self createToolbar];
-                [[NCViewerRichWorkspace shared] viewerAt:self.metadataDetail detail:self];
+                NCViewerRichWorkspace *viewerRichWorkspace = [NCViewerRichWorkspace new];
+                [viewerRichWorkspace viewerAt:self.metadataDetail detail:self];
                 return;
                 
             } else {

iOSClient/Viewer/NCViewerRichWorkspace.swift

@@ -28,11 +28,6 @@ import Foundation
     let appDelegate = UIApplication.shared.delegate as! AppDelegate
     var safeAreaBottom: CGFloat = 0
     
-    @objc static let shared: NCViewerRichWorkspace = {
-        let instance = NCViewerRichWorkspace()
-        return instance
-    }()
-    
     @objc func viewerAt(_ metadata: tableMetadata, detail: CCDetail) {
         
         if #available(iOS 11.0, *) {